How create QActions and their signals according to file

Question

I am using python3 and PyQt4. I want to create a menu with actions, the number of which differs according to an array. I want each of them to save the corresponding information, saved in the array, to a variable. Creating variable number of events seems impossible. So how can i create an event which does different work, according to the action it was activated by? That' s my code:

def buildLoadSettings(self):
    self.settings = array
    for i in range(len(self.settings)):
        exec("self.settings" + str(i) + " = QtGui.QAction('" + self.settings[i][0] + "', self)")
        exec("self.loadMenu.addAction(self.settings" + str(i) + ")")

I want to connect each of the actions with an event and finally save the "self.settings[i][1]" to a variable "settings". Sorry for my novice question.

I just wanted to create multiple actions, with variable number and an event which knows, which action it was called by, so that it uses the corresponding data. ekhumoro gave the exact solution. — iagerogiannis, Nov 29 '16 at 20:56

score 1 · Accepted Answer · answered Nov 29 '16 at 00:27

It's not completely clear what you're trying to achieve, but there are several APIs that should help. There is certainly no need to use ugly exec calls like you are at present.

Here are a few ideas:

Use QAction.setData() to associate some data with each action:

    for item in self.settings:
        action = QtWidgets.QAction(item[0], self)
        action.setData(item[1])
        self.loadMenu.addAction(action)

Use QMenu.actions() to access the actions, rather than creating attributes:

    action = self.loadMenu.actions()[2]
    print((action.text(), action.data()))

Connect a slot to QMenu.triggered() to handle all of its actions in one place:

    self.loadMenu.triggered.connect(self.handleLoadMenu)

def handleLoadMenu(self, action):
    # "action" is the action that was clicked
    text = action.text()
    data = action.data()
    print('Action Clicked: ("%s", %s)' % (text, data))

PS:

If you want to get/set attributes dynamically, use getattr and setattr:

    # self.settings2 = action
    setattr(self, "settings%s" % 2, action)
    # action = self.settings2
    action = getattr(self, "settings%s" % 2)

How create QActions and their signals according to file

1 Answers1